In other news, IBM own Ustream
I'm more surprised that it took this long for IBM to kill it. When they acquired it, they said Ustream would be their "full-service enterprise video offering" so I figured it'd be killed off within a year. The recent rebranding to IBM Cloud Video is them finally getting around to it I guess.
I'd be suprised if anyone upgrades unless they really want it.
I am sure most people switched over to Youtube Live a year or two ago. Rewind and no adverts at the start were more than good enough reasons.